Curtis e



. (No Model.)

, C. B.. MARVIN.

Saw. No. 242,951. Patented June 14,1881.

UNITED STATES I CURTIS It. MARVIN, OF STAMFORD, CONNECTICUT.

sAw.

SPECIFICATION forming part of Letters Patent No. 242,951, dated June 14, 1881.

Application filed February 7, 1881. (No model.)

To all whom it may concern Be it known that I, CURTIs R. MARVIN, a citizen of the United States, residing at Stamford, in the county of Fairield and State of Connecticut, have invented certain 'new and useful Improvements in Saws; and Ido hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention has for its object to furnish a saw in which the blade will be adjustable within its frame, and in which the frame will serve as a gage to regulate the depth ot' cnt.

It consists in a slotted frame and a loose adjustable blade placed within the frame and held by set-screws or other suitable retaining means, as will be hereinafter fully explained.

In the drawings, Figure lis a side elevation of the saw blade and frame. Fig. 2 is a plan of the saine. Figs. 3 and 4 show the r t l Io blade separatedV from the frame, and Fig. 5 shows the frame.

- a is the blade, made in the forni of the blade of the ordinary tenori-saw.

b is the frame, which is made, by preference, ot' two bars, b b2, constructed and fitted snugly together, so as to provide a vertical slot,lb3, between them. The slot extends nearly the entire length ofthe frame, and is just wide enough to permitthe easy insertion into it of the saw-blade.

c c are two set or clamp screws,whichare putthrou gh the en ds of the frame b and th rough ,the ends of the slot, as shown, and they are arranged at a suitable distance apart, so that the ends of the blade c, when inserted in the slot b3, will be close to them.. The inner end ot' the frame is provided with lugs or. other suitable device, d, to which the handle c can be attached. The frame b could be provided 'with additional holes for the set-screws c o', so that a shorter blade than the one shown could be employed, if desired. The frameis shown composed of two bars, b' b2, snugly fitted together; but it could be made in one piece, and the slot b3 be formed by any suitable process.

The ends of the blade a can be provided with graduated scales, as shown in Fig. 3, so that it can be set quickly and truly to cut any desired depth.

In this device the blade can be employed having teeth of different sizes on its opposite edge, as shown in Fig. 4, so that the mechanic can have at hand two saws of different degrees of neness. and the edges of the blade reversed in a very brief space ot" time.

The screws c c can be loosened The slot b3 is shown closed at lits outer end,

and I prefer to have it so; but it will be readily understood that the outer end need not be closed, for the screw o serves to hold the outer ends ot' the bars b b2 firmly in place.

It will be seen, further, that the frame b will serve as a gage by which the depth of the cnt of the blade is regulated, thus obviating the necessity of Aa separate device to be fixed on the blade for this purpose.

If desired, the blade could have a series of small notches (shown in Fig. 4 in dotted lilies) to lit over the set-screw c; but I do not find such notches or other similar construction necessary. The blade is clamped tight enough by theframe and screws for all practical purposes.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

The improved saw-frame, consisting in the combination of the frame or bar l), constructed with the vertical longitudinal slot b3, open above and below, the set-screws c c', the lug cl, secured to the inner end ot' the frame orbar b, and the handle e, all arranged to operate substantially as set forth.

In testimony whereof I affix my signature 1n presence ot' two witnesses, on this 2d day of February, 1881.

CURTIS R. MARVIN.

Witnesses HENRY MARVIN, GEO. T, RUOEE. 

